Revert "Clean up old file-based OTA SELinux rules"

Self sideload OTA installation is aborted in #PPR1.171122.001.
Likely cause is the removal of the file-based OTA rules. Revert
the change while I investigate.

This reverts commit 73885755.

Bug: 35853185
Bug: 69664758
Bug: 15575013

Change-Id: I65ca3bad7251f06df33eae8b2d4bcfada93ae9b8